Rating:

#### Original Writeup - [https://github.com/CTSecUK/CyberYoddha-CTF-2020/blob/main/Write-ups/Shebang4.md](https://github.com/CTSecUK/CyberYoddha-CTF-2020/blob/main/Write-ups/Shebang4.md)

-----

# Shebang4

![Category](http://img.shields.io/badge/Category-Shebang-orange?style=for-the-badge) ![Points](http://img.shields.io/badge/Points-200-brightgreen?style=for-the-badge)

We connect to the shell using this command `ssh -p 1337 [email protected]` and the flag from the Shebang3 challenge as the password.

running the `ls` command in our current directory shows us the file `flag.png`, but we cannot view the image from a shell!?

Instead we read the file into a base64 encoded string using `cat flag.png | base64`;

```
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SUVORK5CYII=
```

Back on my own PC I save the b64 output to a file called `flag.b64` and then use the following command to convert it back to a "**png**" file;

`cat flag.b64 | base64 -d > flag.png`

Viewing the resulting image we can seee the below flag;

![Flag](https://github.com/CTSecUK/CyberYoddha-CTF-2020/blob/main/images/shebang4_flag.png)
CYCTF{SPOT_TH3_D1FF}
```

Next flag is;

## CYCTF{SPOT_TH3_D1FF}

Original writeup (https://github.com/CTSecUK).